Mouse inoperative after standby mode

I have a Toshiba Tecra 8100 operating on Windows XT. When I put it into standby mode, then bring it out of standby, the external mouse (Microsoft) is inoperative, but the little joystick mouse on the keyboard works. Is there a fix for this - other than not using standby mode?

Verify you've got the latest BIOS and USB Controller updates installed for your computer.
If these drivers are already fully updated, it comes down to hardware conflict
Try a different USB port, or try another type of mouse
There is nothing else to do, (other than re-connecting the mouse each time) many users report this same issue, on many systems